pmaports.cfg: add repo:systemd section

pmaports.cfg

@@ -11,3 +11,14 @@ supported_mkinitfs_without_flavors=True
 supported_arches=x86_64,x86,aarch64,armv7,armhf
 supported_fastboot_depends=android-tools
 supported_heimdall_depends=heimdall,android-tools
+
+[repo:systemd]
+pmaports_dir=systemd
+# Build forks of Alpine packages that support usr_merge
+bootstrap_1=apk-tools abuild alpine-base
+# Build systemd related pkgs without deps on each other
+bootstrap_2=[usr_merge] systemd dbus linux-pam
+# Build systemd related pkgs *with* deps on each other
+bootstrap_3=[usr_merge] systemd dbus linux-pam
+# Marker that bootstrap is done, only needs to be built once
+bootstrap_4=[usr_merge] postmarketos-base-systemd